Safety device for disk plow hangers



Au.14,1945. G. REGOi 2,3 1,973

SAFETY- DEVICE FOR DI'SK PLOW HANGERS Filed March 19, 1943- 2Sheets-Sheet 1 INVENTOR. 1 M Gamma-Ross E60 Aug. 14, 1945. Es. R. EGO2,381,973

- SAFETY DEVICE FOR DISK PLOW HANGERS Filed March 19, 194:5zsheets-sheepz IINVENTORI;

GEORGE" ass 00 I BY) hrrogusr Patented Aug. 14, 1945 y y .si nor toMassey-HarrisQCo Ltd Toronto, I 1 5 .Ontario;Ca nada,a limited companyof Canada The present invention 'relates to a' safety device for: diskplows and the-like, 'wherein" depending .hangers: are rigidly secured tothe main frame of'the device and the disk or earth working meansiseither rotatably or rigidly securedf-toa bracket which lies on theside of thedepending hanger lhaving 'apivotabconnection' to the bottomof the 'depending h'anger andb'reakable means at the top 50f. thebracket for holding the bracket into working. position on tIie' hangeIith'e breakable'mjeans :and pivot being adapted toperm-it theearthworkin'g member-toswing' back on the pivot and rideovera-seriousobstriictiorr. a

, :.1An object of my invefition'is to provide a breakable' block savingsknown and uniform breakin strength and'use' tliislil'dck as a'mean's forholding the earth working member in working' 'position.

A further Ob-ject of" my invention is to pivot a bracket on which theearth working member is mounted to the lower end of the depending hangerby means of a bolt and supply a block which lies on the forward loweredge of the depending hanger, the block having a curved front surfacewhich lies against a. raised portion on the bracket, the curve beingpreferably on a radius with the pivot so the block takes the thrustwhich would otherwise be taken by the pivot.

Generally stated, an object of my invention is to provide a simple lowcost breakable means which will release the earth working member whencompanying drawings in which:

Fig. 1 is an enlarged partially sectioned view of one form of myinvention wherein a plow disk is shown rotatably mounted on a bracket.

Fig. 2 is a perspective view of the device as shown in' .Figure 1showing the bracket mounted on the depending member and in its workingposition, the view being taken at a right angle to the side of thedepending member.

Fig. 3 is a view of the device shown in Figure 2 in a position afterhaving met an obstruction serious enough to break the breakable block,but taken from a point somewhat in rear of the view point in Fig. 2. 1

Fig. 4 is a. sectional view of the depending member taken on line 44 ofFigure 2 showing the parts in operating position.

Fig, 5 is a P rspective view of the breakable block.

appear.

Fig. 6 is an-elevationalside view of the thrust *block.

7 is a rear view of the thrust block.

- i Fig; 8 is a fractional view of the main frame or adiskplow or thelike, illustrating the bracket and depending member secured theret'o.' I

" Asthus'i'llustrated, the main frame of the plow is designatedby'numeral ID, the upper portion of a hanger is designated bynumeral IIand its depending member is designated bynumeral l2, member or plate I Ibeing'rigidly held to member III by means of two or more spaced boltsl3. Mem- 'ber lzis providedwi-th an aperture I4 near its lower end for apurpose which will hereinafter In Figures 1,' 2"and 3, I illustrateaplow disk l5 suitably securedto a bracket 16 which is rotatably mountedon'thelower end of a bracket l1 in a manner too well known to requirefurther description.

Bracket I1 is provided with'a flat surface l8 which is adapted to lie onthe side of member l2 as illustrated in Figures 2', 3 and 4 and havingan opening as at l9 which registers with opening 14 in member l2 sothese two members may be secured together by means of a, pivot bolt 20.

I On the forward edge of bracket I1, I provide a flange 2| arranged sowhen the bracket is in working position (see Figures 2' and 4) at leastthe upper end of flange 2| lies against the forward edge of member l2.

Near the upper end of bracket I1, I provide a groove 22 and in line withthis groove, I position a bolt 23 which is adapted to hold member l2snugly against surface l8. A breakable block 24 is provided throughwhich a bolt 26 extends and is positioned as shown in Figures 2 and 4.Breakable block 24 is shaped as illustrated in the various figures, oneside resting on member-l1 as at 25, the other side resting on the rearedge of member I2 as clearly illustrated in Figure 4.

Block 24 is provided with a projection 21 which lies along side memberI2 so as to preventits turning on bolt 26 relative to member l2. Whenbolt 26 is made taut, member l2 will be held firmly against flange 2!and the device will be in working position as shown in Figures 2' and 4.

Flange 2| near its lower edge is enlarged and cut-away on a curve,preferably on a radius with aperture l9 as at 28 having a small groove29 at its bottom.

I provide a thrust block 30 with a shape as illustrated in the variousfigures having a flange 3| which fits loosely in groove 29 so the blockwill be held from moving transversely out of powhich has a definitebreaking strength, is cheap and easily replaced.

Referring now to Fig. 2, it is :assumed that bolt 23 is adjusted so itbarely holds members l2 and I! together. Bolt 20 is not'verytightly-adjusted so that when the lower portion'of disk 'I5'meets aserious obstruction and the plow continues" its forward movement, block24may break' so the disk and its bracket may assume the position shownin Fig. 3, or whatever position is necessary tocausenthe disk to ride,over the obstruction, thus avoiding breaking some expensive part ofthegdevicer; :It;wi1l be understood that member 241s very inexpensiveand thatthe user will have a numberof them on hand a replacements.

Clearly manv-minor detail changes may be made. in the present invention,without departing frornthe spirit and scope of the-appendediclaims.

. Having thus:shown and describedmyinvention,- I;claim-:a

, 1. A device of the class described, comprising a frame;ha,ving adepending member, a bracket having, an earth working membensecured toits lower end, the ;up,p er en d,being adapted to lie on the side ofsaid depending member, a bolt forming a ,transversepivotal connectionbetween the bottom, of asaid depending member and said bracket abreakable block detachably secured to the up per end of said-,bracketand at a distance from said bolt, one side overhanging the rear edge ofsaid depending member and being adapted to hold said bracket in normaloperating position, whereby when said earth working member meets aserious obstruction, said block will break and permit said .earthworking device to swing rearwardly on said bolt as an axis and ride overthe str ct on. 1

2. A, device as recited in claim '1 including;

'a transversely extending projection on said bracket positioned in frontof said depending member forming a pocket, a block positioned in saidpocket and filling the space therein, the forward edge ofthe block andthe rear edge of the "pocket being on a radius with said pivot bolt,whereby the block will take the thrust between said depending member andbracket in various positions of the bracket.

' depending member, a bolt forming a transverse pivotal connectionbetween the lower end of said depending member and said bracket, abreakable block detachably secured to the-upper end ,of said brack ta5distance from said bolt, one

side overhanging, the rear, edge of said depending member and beingadapted tovnormally hold said bracket in operating-position, wherebywhen said disk meets a serious obstruction, said block will break andpermit the disk to [swing .rearwardly and ride ov er the obstruction,another bolt positioned-adjacent said -block adapted'to. slidably holdthe upperv end of said bracket to said depending member. I

' GEORGE ROSS EGO.

